Penholder for chart recorders

ABSTRACT

An improved device for holding lettering pens on chart recorders that is pivotally connected to the recorder and accommodates a self cleaning lettering pen having an integral ink well that requires no remote ink supply or siphon line.

United States Patent [191 Schepartz 1 Jan. 23, 1973 [54] PENHOLDER FORCHART 2,835,549 5/l958 Murdoch eta]. ..346/l39X RECORDERS OTHERPUBLICATIONS [76] Inventor: Abner I. Schepartz, 170 Windmill RoadWiHowGmvepa. 19090 Fitzpatrick, W. 1.; Pen For Chart Recorder; IBM TechnicalDisclosure Bulletin, Vol. ll, No. 3, August Jan. [211 App]. No.: 793,151

Primary Examiner.loseph W. Hanary 52 vs. Cl. ..346/l39 c, 346/140 and[51] Int. Cl. ..G01d 15/16 581 Field ofSearch ..346/l40, 139;33/34,35[57] ABSTRACT An improved device for holding lettering pens onReferences Cited chart recorders that is pivotally connected to theUNITED STATES PATENTS recordenand accommodates a self cleaning letteringpen having an integral ink well that requires no 1,979,713 I l/l934Smulski ..346/139 X remote ink supply or siphon line. 1,630,297 5/l927Heesch 2,078,763 4/1937 Hubbard ..346/1 39 1 Claim, 3 Drawing FiguresPATENTEDJAI 23 m5 INVENTOR ABNER I. SCHEPARTZ Rib I BY K! ATTORNEYSPENIIOLDER FOR CHART RECORDERS A non-exclusive, irrevocable, royaltyfree license in the invention herein described, throughout the world forall purposes of the United States Government, with the power to grantsublicenses for such purposes, is hereby granted to the Government ofthe United States of America.

This invention relates to a device for holding a standard reservoir typelettering pen and more specifically for holding a reservoir typelettering pen for use on chart recorders attached to spectrophotometricand other analytical instruments.

The devices presently in use have a number of deficiencies. In mostcases, both the pen and holder are made of plastic and by necessity theyare made so that when the pen is inserted into the holder some force isneeded to provide a good friction fit to prevent leakage of ink. Thisoften leads to a fracture of one or both components. Cleaning a cloggedpen is also a nuisance. It is almost impossible to clean the pen with awire because its position above the recorder leaves very littleclearance space. Consequently, the pen has to be removed and cleaned andwhen it is replaced the siphon feed for the ink has to be reestablished.Establishing the siphon from a well is another inconvenience of thepresent devices. This is especially so if the recorder unit is mountedinside a housing accessory making the well inaccessible. However, it isnot deemed necessary to dwell further on the deficiencies of the devicespresently in use since these deficiencies are well known to thoseskilled in the art.

Unlike the devices presently in use the device of this invention is madeof metal, not plastic and requires no siphon line or remote ink well. Itwill accommodate any standard, easily available lettering pen. Alettering pen having its own cleaning plunger and integral ink well canbe used facilitating its removal and replacement for cleaning andrefilling with ink. Different colored inks can be used simply bychanging pens. In addition, no force is required to place the pen in theholder and it is locked in position by merely tightening a lock screw.

It is an object of this invention to provide a novel, simple, reliable,trouble-free, convenient writing system for strip-chart recorders.

Another object of this invention is to provide a device that willaccommodate standard, commercially available lettering pens.

'Still another object of this invention is to provide a device in whichthe writing instrument can be easily removed and replaced.

In general, according to this invention, the foregoing objects areaccomplished by the device described in the following specifications andclaims.

IN THE DRAWINGS:

FIG. 1 is a pictorial view of the penholder with part of a recorder.

FIG. 2 is a top plan view of the penholder.

FIG. 3 is a side elevation of the penholder.

Referring to FIGS. 1, 2 and 3, penholder 2 is attached to the recordinginstrument 4 by fitting pivot pin 6 into existing pivot sockets orbearings on the recorder 4. Penholder 2 is firmly attached to pivot pin6 by set screw 8. Lettering pen [0 fits into opening 12 and is removedor replaced by adjusting set screw 14. In FIG.

2, penholder 2 is illustrated as being set somewhat off center on pivotpm 6 to show that its position can be adjusted if necessary. In somecases, depending on the position of the pivot sockets or bearings, thepenholder has to be in the offset position so that the pen can write tothe edge of the chart. Although the penholder illustrated in the drawingwas constructed of aluminum with steel set-screws and pivot pin, it isunderstood that other durable materials can be used within the scope ofthe invention. For convenience and simplicity, lettering pen 10 was thereservoir type with a self contained cleaning plunger.

I claim:

1. In a device for holding a pen for scribing on a chart recorder, saiddevice being pivotally supported in pivot sockets at one end by a pinperpendicular to the lateral plane of the device and having at the otherend means for accommodating a scribing means, the improvement foradjusting the scribing means to an offset position beyond the extremesof the horizontal traverse of the pivot sockets of the recorder, thusproviding means for the device to scribe to the edge of the chart, whichimprovement comprises means for adjusting the position of the device onthe pivot pin and means for holding the device in any selected positionon the pivot pin, the further improvement wherein the scribing meanscontains an integral, easily removable, self-cleaning pen and ink wellthus precluding the need for a remote ink supply and siphoning systemand for cleaning means, and the still further improvement wherein thedevice is constructed of material that is heavy enough to insurecontinuous scribing and light enough to insure against damage to thechart paper.

i it

1. In a device for holding a pen for scribing on a chart recorder, saiddevice being pivotally supported in pivot sockets at one end by a pinperpendicular to the lateral plane of the device and having at the otherend means for accommodating a scribing means, the improvement foradjusting the scribing means to an offset position beyond the extremesof the horizontal traverse of the pivot sockets of the recorder, thusproviding means for the device to scribe to the edge of the chart, whichimprovement comprises means for adjusting the position of the device onthe pivot pin and means for holding the device in any selected positionon the pivot pin, the further improvement wherein the scribing meanscontains an integral, easily removable, self-cleaning pen and ink wellthus precluding the need for a remote ink supply and siphoning systemand for cleaning means, and the still further improvement wherein thedevice is constructed of material that is heavy enough to insurecontinuous scribing and light enough to insure against damage to thechart paper.